Improved electrochemical performance of P2-type concentration-gradient cathode material Na0.65Ni0.16Co0.14Mn0.7O2 with Mn-rich core for sodium-ion batteries.
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| Title: | Improved electrochemical performance of P2-type concentration-gradient cathode material Na0.65Ni0.16Co0.14Mn0.7O2 with Mn-rich core for sodium-ion batteries. |
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| Authors: | Gao, Nengshuang1 (AUTHOR), Guo, Yiwen1 (AUTHOR), Chen, Yuanhua1,2,3 (AUTHOR) cyh@guat.edu.cn, Feng, shuaiqiang4 (AUTHOR), Li, Hechen1 (AUTHOR), Sun, Ruicong1 (AUTHOR), Huang, Bin1 (AUTHOR), Zhong, Shengkui3 (AUTHOR), Chen, Quanqi1,3 (AUTHOR) hpcqq@163.com |
| Source: | Journal of Alloys & Compounds. Oct2023, Vol. 958, pN.PAG-N.PAG. 1p. |
| Subjects: | Electrochemical electrodes, Sodium ions, Cathodes, Oxide electrodes, X-ray diffraction, Diffusion coefficients, Storage batteries |
| Abstract: | The full concentration-gradient Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CG-NCM), in which the composition varies gradiently from core Na 0.65 Ni 0.01 Co 0.01 Mn 0.98 O 2 to shell Na 0.65 Ni 0.31 Co 0.27 Mn 0.42 O 2 , was prepared by a co-precipitation method plus high-temperature calcination, and was investigated by XRD, SEM, TEM and electrochemical measurements. Benefiting from the special concentration-gradient core-shell structure, CG-NCM possesses higher diffusion coefficients of Na+ and the consequently better rate capability and cyclability than concentration-constant Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CC-NCM). Galvanostatically cycled at 30 mA g−1 between 1.5 and 4.1 V (vs Na+/Na), CC-NCM and CG-NCM have initial discharge capacities of 168.5 and 162.5 mA h g−1, and the capacity retentions of 11.5 % and 51.4 % after 100 cycles, respectively. CG-NCM presents high initial discharge capacities of 144.5, 138.2 and 121.8 mA h g−1 at 75, 300 and 750 mA g−1, respectively, and exhibits capacity retentions of 70.6 %, 73.2 % and 76.9 % after 100 cycles, respectively. However, CC-NCM shows initial discharge capacities of 149.5, 136.5 and 107.3 mA h g−1 at 75, 300 and 750 mA g−1, respectively, and the matching capacity retentions are as low as 49.8 %, 52.3 % and 53.9 %, respectively. The results indicate that the construction of concentration-gradient oxide electrode materials is an effective strategy for improvement of the electrochemical performance of oxides cathodes. • Concentration-gradient Ni 0.16 Co 0.14 Mn 0.7 (OH) 2 (CG-NCMH) prepared by co-precipitation. • Full concentration-gradient Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CG-NCM) is target product. • CG-NCM was obtained by high-temperature sintering mixture of CH 3 COONa and CG-NCMH. • CG-NCM is of Na 0.65 Ni 0.01 Co 0.01 Mn 0.98 O 2 core and Na 0.65 Ni 0.31 Co 0.27 Mn 0.42 O 2 shell. • CG-NCM is superior to concentration-constant NCM in electrochemical performance. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Items | – Name: Title Label: Title Group: Ti Data: Improved electrochemical performance of P2-type concentration-gradient cathode material Na0.65Ni0.16Co0.14Mn0.7O2 with Mn-rich core for sodium-ion batteries. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gao%2C+Nengshuang%22">Gao, Nengshuang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Yiwen%22">Guo, Yiwen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Yuanhua%22">Chen, Yuanhua</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> cyh@guat.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Feng%2C+shuaiqiang%22">Feng, shuaiqiang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Hechen%22">Li, Hechen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Ruicong%22">Sun, Ruicong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Bin%22">Huang, Bin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhong%2C+Shengkui%22">Zhong, Shengkui</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Quanqi%22">Chen, Quanqi</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> hpcqq@163.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Alloys+%26+Compounds%22">Journal of Alloys & Compounds</searchLink>. Oct2023, Vol. 958, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electrochemical+electrodes%22">Electrochemical electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium+ions%22">Sodium ions</searchLink><br /><searchLink fieldCode="DE" term="%22Cathodes%22">Cathodes</searchLink><br /><searchLink fieldCode="DE" term="%22Oxide+electrodes%22">Oxide electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+coefficients%22">Diffusion coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Storage+batteries%22">Storage batteries</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The full concentration-gradient Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CG-NCM), in which the composition varies gradiently from core Na 0.65 Ni 0.01 Co 0.01 Mn 0.98 O 2 to shell Na 0.65 Ni 0.31 Co 0.27 Mn 0.42 O 2 , was prepared by a co-precipitation method plus high-temperature calcination, and was investigated by XRD, SEM, TEM and electrochemical measurements. Benefiting from the special concentration-gradient core-shell structure, CG-NCM possesses higher diffusion coefficients of Na+ and the consequently better rate capability and cyclability than concentration-constant Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CC-NCM). Galvanostatically cycled at 30 mA g−1 between 1.5 and 4.1 V (vs Na+/Na), CC-NCM and CG-NCM have initial discharge capacities of 168.5 and 162.5 mA h g−1, and the capacity retentions of 11.5 % and 51.4 % after 100 cycles, respectively. CG-NCM presents high initial discharge capacities of 144.5, 138.2 and 121.8 mA h g−1 at 75, 300 and 750 mA g−1, respectively, and exhibits capacity retentions of 70.6 %, 73.2 % and 76.9 % after 100 cycles, respectively. However, CC-NCM shows initial discharge capacities of 149.5, 136.5 and 107.3 mA h g−1 at 75, 300 and 750 mA g−1, respectively, and the matching capacity retentions are as low as 49.8 %, 52.3 % and 53.9 %, respectively. The results indicate that the construction of concentration-gradient oxide electrode materials is an effective strategy for improvement of the electrochemical performance of oxides cathodes. • Concentration-gradient Ni 0.16 Co 0.14 Mn 0.7 (OH) 2 (CG-NCMH) prepared by co-precipitation. • Full concentration-gradient Na 0.65 Ni 0.16 Co 0.14 Mn 0.7 O 2 (CG-NCM) is target product. • CG-NCM was obtained by high-temperature sintering mixture of CH 3 COONa and CG-NCMH. • CG-NCM is of Na 0.65 Ni 0.01 Co 0.01 Mn 0.98 O 2 core and Na 0.65 Ni 0.31 Co 0.27 Mn 0.42 O 2 shell. • CG-NCM is superior to concentration-constant NCM in electrochemical performance. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jallcom.2023.170386 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Electrochemical electrodes Type: general – SubjectFull: Sodium ions Type: general – SubjectFull: Cathodes Type: general – SubjectFull: Oxide electrodes Type: general – SubjectFull: X-ray diffraction Type: general – SubjectFull: Diffusion coefficients Type: general – SubjectFull: Storage batteries Type: general Titles: – TitleFull: Improved electrochemical performance of P2-type concentration-gradient cathode material Na0.65Ni0.16Co0.14Mn0.7O2 with Mn-rich core for sodium-ion batteries. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gao, Nengshuang – PersonEntity: Name: NameFull: Guo, Yiwen – PersonEntity: Name: NameFull: Chen, Yuanhua – PersonEntity: Name: NameFull: Feng, shuaiqiang – PersonEntity: Name: NameFull: Li, Hechen – PersonEntity: Name: NameFull: Sun, Ruicong – PersonEntity: Name: NameFull: Huang, Bin – PersonEntity: Name: NameFull: Zhong, Shengkui – PersonEntity: Name: NameFull: Chen, Quanqi IsPartOfRelationships: – BibEntity: Dates: – D: 05 M: 10 Text: Oct2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 09258388 Numbering: – Type: volume Value: 958 Titles: – TitleFull: Journal of Alloys & Compounds Type: main |
| ResultId | 1 |
